KEV Entry

CVE-2026-39987

Known Exploited Vulnerability Entry KEVIntel

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Entry Details
Confirmed Exploited

CVE-2026-39987

2026-06-01 13:23 UTC

Timestamps

2026-06-01

2026-06-01

Scope

KEVIntel entry: marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass | Affected: marimo-team / marimo | CVSS: 9.3 (CRITICAL) | EPSS: 0.95645 | Used in malware: unknown | Not yet in CISA KEV: False

References
  • {'id': 'CVE-2026-39987', 'url': 'https://www.cve.org/CVERecord?id=CVE-2026-39987'}
  • {'id': 'kevintel', 'url': 'https://kevintel.com/CVE-2026-39987'}

411209ae-3423-40c6-9af7-4d45b2c1e371

KEVIntel
caeb2787-0d58-4236-9039-7c86c3e566f3

2026-06-23 14:03 UTC

2026-07-10 06:14 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report kevintel successful_exploitation 0.70
View details 
{
  "added_date": "2026-06-01T13:23:39.702Z",
  "ahead_of_cisa_kev": {
    "count": 1,
    "unit": "day"
  },
  "cvss_score": 9.3,
  "cvss_severity": "CRITICAL",
  "epss_percentile": 0.99861,
  "epss_score": 0.95645,
  "feed": "KEVIntel (kevintel.com)",
  "not_yet_in_cisa_kev": false,
  "product": "marimo",
  "title": "marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass",
  "used_in_malware": "unknown",
  "vendor": "marimo-team"
}
 -
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